This post concern the build of a ListEditor dealing with filter definition relying on regular expression.
The beginning, create a FilterDialog
This dialog aims to get a filter entry. This dialog should return a String containing a regular expression. (I don't verify that the content typed is OK but I will)
the FilterDialog source code :
import org.eclipse.jface.dialogs.TitleAreaDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class FilterDialog extends TitleAreaDialog {
private Text filterValue;
private String filter;
public FilterDialog(Shell parentShell) {
super(parentShell);
}
@Override
public void create() {
super.create();
setTitle("Add filter to keep tests");
}
@Override
protected Control createDialogArea(Composite parent) {
Composite area = (Composite) super.createDialogArea(parent);
Composite container = new Composite(area, SWT.NONE);
container.setLayoutData(new GridData(GridData.FILL_BOTH));
GridLayout layout = new GridLayout(2, false);
container.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
container.setLayout(layout);
createFilter(container);
return area;
}
private void createFilter(Composite container) {
Label lbtFirstName = new Label(container, SWT.NONE);
lbtFirstName.setText("Filter as regular expression");
GridData dataFirstName = new GridData();
dataFirstName.grabExcessHorizontalSpace = true;
dataFirstName.horizontalAlignment = GridData.FILL;
filterValue = new Text(container, SWT.BORDER);
filterValue.setLayoutData(dataFirstName);
}
@Override
protected boolean isResizable() {
return true;
}
private void saveInput() {
filter = filterValue.getText();
}
@Override
protected void okPressed() {
saveInput();
super.okPressed();
}
public String getFilter() {
return filter;
}
}
Extend ListEditor
the source code :
import java.io.File;
import org.eclipse.jface.preference.ListEditor;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.widgets.Composite;
public class FilterTestEditor extends ListEditor {
protected FilterTestEditor() {
}
public FilterTestEditor(String name, String labelText, Composite parent) {
init(name, labelText);
createControl(parent);
}
protected String createList(String[] items) {
StringBuffer path = new StringBuffer("");//$NON-NLS-1$
for (int i = 0; i < items.length; i++) {
path.append(items[i]);
path.append(File.pathSeparator);
}
return path.toString();
}
protected String getNewInputObject() {
String filter=null;
FilterDialog dialog = new FilterDialog(getShell());
dialog.create();
if (dialog.open() == Window.OK) {
System.out.println(dialog.getFilter());
filter = dialog.getFilter();
}
return filter;
}
protected String[] parseString(String stringList) {
StringTokenizer sto = new StringTokenizer(stringList, File.pathSeparator
+ "\n\r");
ArrayList<String> v = new ArrayList<String>();
while (st.hasMoreElements()) {
v.add((String) sto.nextElement());
}
return (String[]) v.toArray(new String[v.size()]);
}
}
and finally in the préférence page add
addField(new FilterTestEditor(KEY_FILTER_TEST, "Test filtering", getFieldEditorParent()));
